Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2019 6 18.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 06/18/2019   09:52:36   (  -0.04,-128.22) (  -0.62,-125.56)  303.09                80
 06/19/2019   22:11:37   (   0.07,-128.19) (  -0.54,-130.81)  299.10                80
 06/20/2019   21:55:23   (   0.06,-128.17) (   0.51,-126.24)  219.81                80
 06/22/2019   10:14:14   (  -0.08,-128.13) (   0.68,-131.44)  377.73                80
 06/23/2019   09:58:00   (  -0.07,-128.11) (  -0.36,-126.88)  140.67                80
 06/24/2019   22:17:01   (   0.09,-128.06) (  -0.79,-132.13)  462.67                80
 06/25/2019   22:00:45   (   0.08,-128.04) (   0.19,-127.55)   55.86                80
 06/28/2019   10:00:42   (  -0.09,-127.97) (  -0.04,-128.18)   23.99                80
 06/29/2019   09:44:27   (  -0.08,-127.94) (  -1.02,-123.60)  493.57                80
 06/30/2019   22:03:28   (   0.11,-127.87) (  -0.12,-128.85)  111.47                80
 07/01/2019   21:47:13   (   0.10,-127.84) (   0.87,-124.27)  405.94                80